CN106680096A - Bidirectional loading fatigue testing device for multi-specimen adhesive joint - Google Patents
Bidirectional loading fatigue testing device for multi-specimen adhesive joint Download PDFInfo
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- CN106680096A CN106680096A CN201710191269.6A CN201710191269A CN106680096A CN 106680096 A CN106680096 A CN 106680096A CN 201710191269 A CN201710191269 A CN 201710191269A CN 106680096 A CN106680096 A CN 106680096A
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- 238000011068 loading method Methods 0.000 title claims abstract description 48
- 238000009661 fatigue test Methods 0.000 title claims abstract description 26
- 239000000853 adhesive Substances 0.000 title abstract 6
- 230000001070 adhesive effect Effects 0.000 title abstract 6
- 230000002457 bidirectional effect Effects 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 149
- 230000000694 effects Effects 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 10
- 230000035882 stress Effects 0.000 abstract description 10
- 239000004568 cement Substances 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 240000002853 Nelumbo nucifera Species 0.000 description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 3
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to a bidirectional loading fatigue testing device for a multi-specimen adhesive joint. The bidirectional loading fatigue testing device comprises an upper fixed loading plate, a lower fixed loading plate, a support post, a loading support plate, adhesive specimens, a shearing specimen I, a shearing specimen II, an upper U-shaped connector I, a lower U-shaped connector I, an upper U-shaped connector II, a lower U-shaped connector II, a U-shaped connector III, a U-shaped connector IV, a U-shaped connector V, a U-shaped connector VI, a lever I, a lever II, a lever III, a lever IV, a power device I, a power device II, a movable pulley I, a fixed pulley II, a fixed pulley III, a fixed pulley IV and the like. The same AC or constant tensile loads are applied to multiple adhesive specimens through the power device I and multi-stage levers; and the same AC or constant shear loads are added to the multiple adhesive specimens through the power device II, the multi-stage levers, a pulley block and a steel wire. The device is capable of simulating the stress condition of the adhesive structure in a complicated stress state, carrying out a fatigue test and researching fatigue and aging characteristics.
Description
Technical field
The present invention relates to multiple bonding test specimens can be applied constant or be handed over by a kind of multispecimen bonded joint fatigue experimental device
The tensile load of change, while constant or alternation shear-type load can be applied, can effectively simulate bonded structure in complex stress shape
Force-mechanism and fatigue properties under state.
Background information
At present, high speed motor car technology high-speed development, automobile-used cement is widely used on EMU glass for vehicle window.Car
After certain service life, can the intensity of vehicle window cement also reach the life security of use requirement and passenger to window bonded structure
It is directly related, therefore be highly desirable to study the fatigue aging characteristic of vehicle window cement, fatigue aging characteristic can lead to
Crossing fatigue test carries out checking analysis.
Vehicle window cement force status are more complicated, and EMU is affected by car body deadweight and operating condition, car body
Self structure can deform, and cause vehicle window cement by the shear loads parallel to forms.When EMU is in height
High velocity air causes vehicle window by negative pressure during speed traveling, and vehicle window cement is acted on by the tensile load perpendicular to forms；And work as car body
Vehicle window inside and outside air pressure balance when static, vehicle window cement is no longer by the tensile load perpendicular to forms.Due to vehicle window positive and negative air-pressure
Alternate, vehicle window cement by perpendicular to forms stretching alternate load effect.Therefore motor-car is in the whole process run
Middle vehicle window cement had both received the shearing alternate load parallel to forms, and by the stretching alternate load perpendicular to forms.
When the effect of vehicle window cement stress is studied, due to stress point cannot be carried out to whole motor-car vehicle window bonded structure
Analysis, can only simulate vehicle window cement stress by bonding test specimen.The stretching and shearing alternate load fatigue test of test specimen can lead to
Cross existing fatigue device to realize, but have obvious shortcoming and defect：Although existing fatigue experimental device can apply to bonding test specimen
The fatigue load of shear direction and draw direction, can only load to single test specimen, and testing needs to carry out a large amount of test specimens
Fatigue test, the excessive cycle when testing multiple test specimens not only affects experiment process, and consumes man power and material, no
Beneficial to scientific research and energy saving.
Want the tired stressing conditions for simulating motor-car vehicle window bonded structure, need to bonding test specimen while applying shear direction
With the fatigue load of draw direction, realization had both applied tensile load to bonding test specimen, while applying identical or different operating frequency
With the shear-type load of amplitude.In order to preferably simulate the true stressing conditions of EMU vehicle window cement, it is necessary to design
Multiple bonding test specimens can be applied stretching alternate load by a kind of fatigue experimental device, while and can apply to shear alternate load.It is logical
Cross fatigue experimental device to test bonding test specimen, set up bonding test specimen and vehicle window cement actual loading situation Approximate Equivalent
Operating condition of test, facilitate the later stage to vehicle window cement fatigue and aging characteristics study.
The content of the invention
The purpose of the present invention is the deficiency existed for existing bonding agent fatigue experiment technology, and invention one kind can be to multiple examinations
Part applies the multispecimen bonded joint biaxial loadings fatigue test device of alternation or Constant Tensile Load and shear-type load simultaneously, should
The characteristics of device has high compact conformation, reliability, good each test specimen load concordance and stable energy-conservation.
Technical scheme proposed by the present invention：
A kind of multispecimen bonded joint biaxial loadings fatigue test device, including upper fixed load plate 1, lower fixed load plate
25th, support column 26；
Upper fixed load plate 1 and lower fixed load plate 25 correspondence are placed in parallel, and are fixedly connected between two load plates multipair
Support column 26, support column 26 is relative to be built up in two sides；Loading gripper shoe 10 is fixed on below fixed load plate 1, and position
In the middle of each pair support column 26, per group of loading gripper shoe 10, upper U-shaped connector I 12, bonding test specimen 18, lower U-shaped connector I 19
It is hinged successively, the lower U-shaped connector I 19 of two adjacent groups is hinged respectively with the two ends of lever I 20, and the upper end of U-shaped connector V 21 is hinged
In the middle part of lever I 20, lower end is articulated with the end of lever II 22, and the other end of lever II 22 correspondence is hinged another group of same examination
Part；The middle part of VI 23 upper end hinged lever of U-shaped connector II 22, lower end is hinged power set I 24, and power set I 24 are fixed on down
In fixed load plate 25；The active force of power set I 24, to bonding test specimen, applies bonding examination by U-shaped connector and lever transmission
Part tensile fatigue load；
Shear test block I 17 is fixed on the lower aluminium alloy coupon of bonding test specimen 18, and shear test block II 13 is fixed on bonding test specimen
18 upper aluminium alloy coupon, shear test block I 17 is articulated with U-shaped connector II 16, and shear test block II 13 is articulated with lower U-shaped connection
Part II 14；Upper U-shaped connector II 16, lower U-shaped connector II 14 are located at same axis；
Power set II 8 are fixed to fixed load plate 1, in the hinged lever III 6 of U-shaped connector III 7 of power set II 8
Portion, one end of lever III 6 is hinged the upper end of U-shaped connector IV 5, and the lower end of U-shaped connector IV 5 is hinged with the middle part of lever IV 4, lever IV 4
Two ends are fixedly connected movable pulley I 3, and the other end of lever III 6 is correspondingly arranged identical test specimen；
Each movable pulley I 3 respectively by one group be fixed on same vertical cross-section determine cunning in fixed load plate 1
Take turns II 9, fixed pulley III 11 and the fixed pulley IV 15 that is fixed on column 26 carry out break-in positioning, and with upper and lower U-shaped connector
II 16,14 series connection；When power set II 8 work, movable pulley I 3 is moved along the actuating rod axis direction of power set II 8, drives steel
Cord 2 tenses shear test block I, II 17,13, is applied to the shear fatigue load of bonding test specimen 18；
Described power set I 24 and power set II 8 can be operated with certain amplitude, cycle, frequency.Upper,
The upper pin and lower bearing pin axis of lower U-shaped connector I is mutually perpendicular to, and forms class gimbal structure, prevents bonding test specimen bending moment
With the effect of moment of torsion.
The power set I 24 are operated with certain amplitude, cycle, frequency, by lever and U-shaped connector, are applied
The alternation or Constant Tensile Load in several formed objects of bonding test specimen 18 and direction are added to, if applying to draw to N number of bonding test specimen
Load p is stretched, then power set I are exerted oneself as N × P.
The pin-and-hole axis of the shear test block I 17 and shear test block II 13 will be total to the median surface of bonding test specimen bonding glue-line
Face, it is ensured that shear test block is applied to bonding test specimen shear-type load, and the side for being axially perpendicular to bonding test specimen of steel wire rope 2 reduces
The effect of shear-type load cross component force.
Steel wire rope front and back end connects upper and lower U-shaped connector II, the steel between upper and lower U-shaped connector II to fixed pulley IV 15
Not less than L, (length of L is chosen will ensure that the impact of component produced by steel wire rope deflection angle to shear-type load can to cord length
Ignore), when bonding test specimen Tensile alternate load, the deformation of bonding test specimen glue-line can cause wirerope axis to incomplete
Perpendicular to the side of bonding test specimen, shadow of the cross component force to bonding test specimen shear-type load can be reduced when rope capacity takes L
Ring..Power set II 8 can be operated with certain amplitude, cycle, frequency, the shear-type load suffered by the bonding test specimen
Equal to the 1/2 of the active force of movable pulley I 3, if to N number of bonding test specimen apply shear-type load Q, power set II exert oneself for 2 × N ×
Q。
By fatigue experimental device, multiple bonding test specimens are loaded using multi-grade lever structure, 2 test specimens are entered
During row loading, 1 grade of lever is needed；When loading to 4 test specimens, 2 grades of levers are needed；When loading to 8 test specimens, need
3 grades of levers；When loading to N number of test specimen, it is assumed that need M level levers, 2M=N, then need M=log2(N) level lever.
Beneficial effect：
Multiple bonding test specimens can be applied to hand over by the 1st, multispecimen bonded joint biaxial loadings fatigue test device of the present invention simultaneously
Become or constant tensile load and shear-type load, can effectively simulate force-mechanism of the bonded structure under complex stress condition and
Fatigue aging characteristic, it is ensured that the load suffered by each test specimen is equal, greatly shortens experimental period.
2nd, multispecimen bonded joint biaxial loadings fatigue test device of the present invention, can carry out constant stretch to bonding test specimen
The senile experiment of load and stationary shearing load, can also carry out the fatigue aging reality of alternation tensile load and stationary shearing load
Test, it is also possible to carry out the fatigue aging experiment of Constant Tensile Load and alternating shear load, while alternation stretching can be carried out carrying
Lotus and the fatigue experiment of alternating shear load.The stressing conditions by bonded structure under complex stress condition can be simulated, to glue-line
Fatigue and aging characteristics studied.
3rd, multispecimen bonded joint biaxial loadings fatigue test device of the present invention, by multi-grade lever structure to multiple bondings
Test specimen applies tensile load, and each test specimen stress is equal in magnitude, direction is identical.By multi-grade lever and pulley structure to bonding test specimen
Apply shear-type load, each bonding test specimen is by shear-type load is equal in magnitude, direction is identical.Power set I are same to multiple bonding test specimens
When apply alternation or constant tensile load, power set II apply alternation simultaneously to multiple bonding test specimens or constant shearing is carried
Lotus.Experiment reduces power set gross capability power, had not only reduced equipment cost but also have received the effect of energy-conservation, it is ensured that experiment
The reliability of data.
4th, multispecimen bonded joint biaxial loadings fatigue test device of the present invention, shear test block is separately fixed at bonding test specimen
Upper and lower aluminium alloy coupon, the axis of two shear test block pin-and-holes is coplanar with bonding test specimen glue-line median surface, reduces shear test block
Impact of the cross component force to bonding test specimen shear-type load.
5th, multispecimen bonded joint biaxial loadings fatigue test device of the present invention, control system can provide basic test
Cycling wave form function, it is also possible to according to requirement of experiment, specific alternating download is arranged to power set I and power set II by user
The loading spectrum and cycle-index of lotus circulation, so as to the actual working environment of more real reaction structure, makes the fatigue of bonding test specimen
Senile experiment result more meets the fatigue and aging conditions of actual bonded structure.
Description of the drawings
With reference to the accompanying drawings and examples the invention will be further described.
Fig. 1 is multispecimen bonded joint biaxial loadings fatigue test device structural representation of the present invention；
Fig. 2 is the knot that the present invention applies tensile load by power set I 24 and lever construction to multiple bonding test specimens 18
Structure schematic diagram；
Fig. 3 is bonding test specimen 18 of the present invention, shear test block I 17, shear test block II 13, upper U-shaped connector I 12, lower U-shaped company
Fitting I 19, upper U-shaped connector II 16, the structural representation of lower U-shaped connector II 14；
Fig. 4 is bonding test specimen 18 of the present invention, shear test block I 17, the structural representation of shear test block II 13；
Fig. 5 is structural representation of the present invention by II 9 pairs of applying powers of steel wire rope 2 of movable pulley 3 and fixed pulley；
Fig. 6 is the structural representation of present invention loading gripper shoe 10.
Wherein：1st, upper fixed load plate 2, steel wire rope 3, movable pulley I 4, lever IV 5, U-shaped connector IV 6, lever
III 7, U-shaped connector III 8, power set II 9, fixed pulley II 10, loading gripper shoe 11, fixed pulley III 12, upper U-shaped connect
Fitting I 13, shear test block II 14, lower U-shaped connector II 15, fixed pulley IV 16, upper U-shaped connector II 17, shear test block
I 18, bonding test specimen 19, lower U-shaped connector I 20, lever I 21, U-shaped connector V 22, lever II 23, U-shaped connector
VI 24, power set I 25, lower fixed load plate 26, support column
Specific implementation method
Present example assumes that the present invention can simultaneously to 4 bonding test specimen loading formed objects and the tensile load in direction
And shear-type load.
This device can apply alternation or constant tensile load and shear-type load to bonding test specimen, can simulate and be answered by complicated
The stressing conditions of bonded structure under power state, carry out fatigue test, study its fatigue and aging characteristics.
Described multispecimen bonded joint biaxial loadings fatigue test device, as shown in figure 1, its composition includes：Upper fixation
Load plate 1, lower fixed load plate 25, support column 26, loading gripper shoe 10, bonding test specimen 18, shear test block I 17, shear test block
II 13, upper U-shaped connector I 12, lower U-shaped connector I 19, upper U-shaped connector II 16, lower U-shaped connector II 14, U-shaped connector
III 7, U-shaped connector IV 5, U-shaped connector V 21, U-shaped connector VI 23, lever I 20, lever II 22, lever III 6, lever IV
4th, power set I 24, power set II 8, movable pulley I 3, fixed pulley II 9, fixed pulley III 11, fixed pulley IV 15, steel wire rope 2, pin
Axle, screw, nut.
Upper fixed load plate 1 and lower fixed load plate 25 correspondence are placed in parallel, and company is fixed with nut between two load plates
Multipair support column 26 is connect, support column 26 is relative to be built up in two sides；Screwed hole is arranged at loading gripper shoe 10 top, and there is pin side
Hole, loading gripper shoe 10 is connected by screw fixed load plate 1, and in the middle of each pair support column 26, upper U-shaped connector I
12, two ends are fluted and pin-and-hole, and upper pin-and-hole loads gripper shoe 10 by hinge, and lower pin-and-hole passes through hinge bonding test specimen
18 upper ends.Bonding test specimen 18 is made up of upper aluminium alloy coupon, bonding glue-line, lower aluminium alloy coupon, upper aluminium alloy coupon and lower aluminum
Respectively there is a pin-and-hole above alloy coupon.Lower U-shaped connector I 19, two ends are fluted and pin-and-hole, and upper pin-and-hole passes through hinge
The lower end of bonding test specimen 18, lower pin-and-hole passes through the one end of hinge lever I 20.The one end of lever I 20.The other end connects same one group
Test specimen；The upper pin and lower bearing pin axis of upper and lower U-shaped connector I is mutually perpendicular to, and forms class gimbal structure, prevents bonding from trying
The effect of part bending moment and moment of torsion.The middle part of lever I 20 passes through the upper end of hinge U-shaped connector V 21, under U-shaped connector V 21
End is hinged with the U-shaped connector VI 23 on power set I 24, is moved by the one end of hinge lever II 22, the middle part of lever II 22
Power apparatus I 24 are fixed on lower fixed load plate 25.The other end of lever II 22 correspondence is hinged another group of same test specimen；Power is filled
I 24 active forces are put by U-shaped connector and lever transmission to bonding test specimen, applies the certain tensile fatigue load of bonding test specimen.
If applying tensile load P to N number of bonding test specimen, power set I are exerted oneself as N × P.
Shear test block I 17, shear test block II 13 are shaped as L-shaped, respectively there is a pin-and-hole above.Shear test block I 17 passes through spiral shell
Nail is fixed on the lower aluminium alloy coupon of bonding test specimen 18, and shear test block II 13 is fixed by screws in the upper aluminum of bonding test specimen 18 and closes
Golden coupon.The pin-and-hole axis of shear test block I 17 and shear test block II 13 is coplanar with the glue-line median surface of bonding test specimen 18, reduces shearing
Impact of the cross component force of test specimen to bonding test specimen shear-type load.
Power set II 8 are fixed to fixed load plate 1, and the U-shaped connector III 7 of power set II 8 passes through hinge
In the middle of lever III 6, the two ends of lever III 6 pass through bearing pin by the upper end of hinge U-shaped connector IV 5, the lower end of U-shaped connector IV 5
It is connected with the centre of lever IV 4, the two ends of lever IV 4 connection movable pulley I 3.
Fixed pulley IV 15 is fixed by screws in support column 26, and fixed pulley II 9 and fixed pulley III 11 are fixed by screws in
Upper fixed load plate 1.Pulley support is U-shaped structure, and there is pin-and-hole upper end, and circular hole is arranged at bottom.The setting angle of pulley support can be with
Adjust, to carry out appropriate angle adjustment in assembling process.The width of groove can be prevented slightly larger than the diameter of steel wire rope 2 on pulley
Only in the trench lateral sliding and friction force of steel rope are excessive for steel wire rope, reduce test specimen stress and receive friction effects.Steel wire rope 2
The side of bonding test specimen is axially perpendicular to, reduces the effect of shear-type load cross component force.
Each movable pulley I 3 respectively by one group of fixed pulley II 9 being fixed on same vertical cross-section, fixed pulley III 11 with
And fixed pulley IV 15 carries out break-in positioning, and connect with upper and lower U-shaped connector II 16,14；When power set II 8 work, move and slide
Take turns I 3 to move along the actuating rod axis direction of power set II 8, drive steel wire rope 2 tense shear test block I 17, II 13, be applied to viscous
Connect the shear fatigue load of test specimen 18.
The shear-type load of bonding test specimen 18 is applied to by shear test block, the shear-type load suffered by bonding test specimen is equal to movable pulley
The 1/2 of I 3 active forces.If applying shear-type load Q to N number of bonding test specimen, power set II are exerted oneself as 2 × N × Q.
If 4 bonding test specimens are loaded with fatigue load 1000N simultaneously, power set II 8 are exerted oneself as 8000N.
Every steel wire rope front and back end connects one group of upper and lower U-shaped connector II, and upper and lower U-shaped connector II arrives fixed pulley IV 15
Between steel wire rope to grow, when bonding test specimen Tensile alternate load, glue-line deformation can cause steel wire rope to produce certain deflection
Angle, not less than L, (length of L is chosen will ensure steel wire to upper and lower U-shaped connector II to the rope capacity between fixed pulley IV 15
Impact of the component produced by rope deflection angle to shear-type load is negligible),.Assume that bonding test specimen (18) glue-line can occur
The deformation of 1mm, the rope capacity between upper and lower U-shaped connector II to fixed pulley IV 15 is 400mm.I 24 pairs, power set glue
When connecing the applying stretching alternate load of test specimen 18, glue-line deformation can cause the deflection that steel wire rope produces arctan (1/400)=0.16 °
Angle, the component that steel wire rope angle change is produced has little to no effect to shearing force suffered by bonding test specimen 18.
By fatigue experimental device, multiple bonding test specimens are loaded using multi-grade lever structure.2 test specimens are entered
During row loading, 1 grade of lever is needed；When loading to 4 test specimens, 2 grades of levers are needed；When loading to 8 test specimens, need
3 grades of levers；When loading to N number of test specimen, it is assumed that need M level levers, 2M=N, then need M=log2(N) level lever.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without through performing creative labour.Therefore, the invention is not restricted to enforcement here
Example, those skilled in the art's announcement of the invention, the improvement made without departing from scope and modification all should be
Within protection scope of the present invention.
Claims (8)
1. a kind of multispecimen bonded joint biaxial loadings fatigue test device, including upper fixed load plate (1), lower fixed load plate
(25), support column (26), which is mainly characterized in that：
Upper fixed load plate (1) and lower fixed load plate (25) correspondence are placed in parallel, and are fixedly connected between two load plates multipair
Support column (26), support column (26) is relative to be built up in two sides；Loading gripper shoe (10) is fixed under fixed load plate (1)
Face, and in the middle of each pair support column (26), per group of loading gripper shoe (10), upper U-shaped connector I (12), bonding test specimen (18),
Lower U-shaped connector I (19) is hinged successively, and lower U-shaped connector I (19) and the two ends of lever I (20) of two adjacent groups are hinged, and U-shaped connects
The upper end of fitting V (21) is articulated with the middle part of lever I (20), and lower end is articulated with the end of lever II (22), the other end of lever II (22)
Correspondence is hinged another group of same test specimen；The middle part of VI (23) upper end hinged lever of U-shaped connector II (22), lower end is hinged power dress
I (24) is put, power set I (24) are fixed on lower fixed load plate (25)；The active force of power set I (24) is connected by U-shaped
Part and lever transmission apply bonding test specimen tensile fatigue load to bonding test specimen；
Shear test block I (17) is fixed on the lower aluminium alloy coupon of bonding test specimen (18), and shear test block II (13) is fixed on bonding examination
The upper aluminium alloy coupon of part (18), shear test block I (17) is articulated with U-shaped connector II (16), and shear test block II (13) is hinged
In lower U-shaped connector II (14)；Upper U-shaped connector II (16), lower U-shaped connector II (14) are positioned at same axis；
Power set II (8) are fixed to fixed load plate (1), the hinged lever of U-shaped connector III (7) of power set II (8)
III (6) middle part, one end of lever III (6) is hinged the upper end of U-shaped connector IV (5), in the lower end of U-shaped connector IV (5) and lever IV (4)
Portion is hinged, and the two ends of lever IV (4) are fixedly connected movable pulley I (3), and the other end of lever III (6) is correspondingly arranged identical test specimen；
Each movable pulley I (3) respectively by one group be fixed on same vertical cross-section determine cunning on fixed load plate (1)
Wheel II (9), fixed pulley III (11) and the fixed pulley IV (15) that is fixed on column (26) carry out break-in positioning, and with upper and lower U
Shape connector II (16,14) is connected；When power set II (8) work, movable pulley I (3) acts on rod axis along power set II (8)
Direction is moved, and drives steel wire rope (2) to tense shear test block I, II (17,13), is applied to bonding test specimen (18) shear fatigue load.
2. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：Institute
The power set I (24) and power set II (8) stated can be operated with certain amplitude, cycle, frequency.
3. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：
The upper pin and lower bearing pin axis of upper and lower U-shaped connector I is mutually perpendicular to, and forms class gimbal structure, prevents bonding test specimen by curved
The effect of square and moment of torsion.
4. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：Institute
State power set I (24) to be operated with certain amplitude, cycle, frequency, by lever and U-shaped connector, be applied to some
Individual bonding test specimen (18) formed objects and the alternation or Constant Tensile Load in direction, if applying tensile load to N number of bonding test specimen
P, then power set I exert oneself as N × P.
5. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：Institute
(the pin-and-hole axis of (13) is coplanar with the median surface of bonding test specimen bonding glue-line, protects to state shear test block I (17) and shear test block II
Card shear test block is applied to bonding test specimen shear-type load, and the side for being axially perpendicular to bonding test specimen of steel wire rope (2) reduces shearing
The effect of load cross component force.
6. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：
Upper and lower U-shaped connector II to the rope capacity between fixed pulley IV 15 is not less than L, and the length of L is chosen and to ensure steel wire
Impact of the component produced by rope deflection angle to shear-type load is negligible, when bonding test specimen Tensile alternate load,
The deformation of bonding test specimen glue-line can cause wirerope axis to the side for being not perfectly perpendicular to bonding test specimen, when rope capacity takes L
Impact of the cross component force to bonding test specimen shear-type load can be reduced.
7. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：It is dynamic
Power apparatus II (8) can be operated with certain amplitude, cycle, frequency, and the shear-type load suffered by the bonding test specimen is equal to
The 1/2 of the active force of movable pulley I (3), if applying shear-type load Q to N number of bonding test specimen, power set II are exerted oneself as 2 × N × Q.
8. a kind of multispecimen bonded joint biaxial loadings fatigue test device according to claim 1, it is characterised in that：It is logical
Fatigue experimental device is crossed, multiple bonding test specimens are loaded using multi-grade lever structure, when loading to 2 test specimens,
Need 1 grade of lever；When loading to 4 test specimens, 2 grades of levers are needed；When loading to 8 test specimens, 3 grades of levers are needed；
When loading to N number of test specimen, it is assumed that need M level levers, 2M=N, then need M=log2(N) level lever.
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| CN107764645B (en) * | 2017-10-09 | 2021-05-07 | 中国矿业大学 | Large-size clay high-pressure consolidation test device |
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